A new report found high-earning, older millennials would benefit from Trump's Social Security tax proposal—but not all groups would thrive.

With the tax-filing season in progress, you probably have wondered how you compare with other Arizonans. Here are some numbers supplied by the IRS.

Forty-one U.S. states, including populous states like California, Texas and Florida, do not tax Social Security benefits. However, nine states still do—each with varying rules based on the income levels of the recipients.